This workbook can be used by practicing industrial hygienists either as a handy reference guide for the more common industrial hygiene formulas or as a review manual for the industrial hygiene certification examinations. Designed to assist in the understanding and application of the many industrial hygiene formulas and relationships, this workbook provides a comprehensive listing of numerous formulas; for the more advanced, a bibliography has been created to assist in obtaining these formulas and relationships. All problems presented are original and attempt to simulate real-life situations and calculations and to identify important chemical, physical, or industrial hygiene principles.